package etc.com.sql;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import etc.com.market.R;

import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;

public class AdapterBase {

	
    private static final String TAG = "AdapterBase";
    private static final String DATABASE_NAME = "church";
    private static final int DATABASE_VERSION = 1;
   
	    
    public Context context;
    
    protected DatabaseHelper DBHelper;
    protected SQLiteDatabase db;

    public AdapterBase(Context ctx) 
    {
        this.context = ctx;
        DBHelper = new DatabaseHelper(context);
    }

    
	public static class DatabaseHelper extends SQLiteOpenHelper 
    {
		public static String DB_PATH = "/data/data/etc.com.church/databases/";
	    private static String DB_NAME = "church";
	    private SQLiteDatabase myDataBase ; 

		Context m_context;
        public DatabaseHelper(Context context) 
        {
            super(context, DB_NAME, null, DATABASE_VERSION);
            m_context = context;
        }

        /**
         * Creates a empty database on the system and rewrites it with your own database.
         * */
        public void createDataBase() throws IOException{
     
        	boolean dbExist = checkDataBase();
     
        	if(dbExist){
        		//do nothing - database already exist
        	}else{
     
        		//By calling this method and empty database will be created into the default system path
                   //of your application so we are gonna be able to overwrite that database with our database.
            	this.getReadableDatabase();
     
            	try {
     
        			copyDataBase();
     
        		} catch (IOException e) {
     
            		throw new Error("Error copying database");
     
            	}
        	}
     
        }

        /**
         * Check if the database already exist to avoid re-copying the file each time you open the application.
         * @return true if it exists, false if it doesn't
         */
        private boolean checkDataBase(){
     
        	SQLiteDatabase checkDB = null;
     
        	try{
        		String myPath = DB_PATH + DB_NAME;
        		checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
     
        	}catch(SQLiteException e){
     
        		//database does't exist yet.
     
        	}
     
        	if(checkDB != null){
     
        		checkDB.close();
     
        	}
     
        	return checkDB != null ? true : false; 
        }

        /**
         * Copies your database from your local assets-folder to the just created empty database in the
         * system folder, from where it can be accessed and handled.
         * This is done by transfering bytestream.
         * */
        private void copyDataBase() throws IOException{
     
        	//Open your local db as the input stream 
        	//InputStream myInput = m_context.getAssets().open(DB_NAME);
        	 InputStream myInput = m_context.getResources().openRawResource(R.raw.church);
        	// Path to the just created empty db
        	String outFileName = DB_PATH + DB_NAME;
     
        	//Open the empty db as the output stream
        	OutputStream myOutput = new FileOutputStream(outFileName);
     
        	//transfer bytes from the inputfile to the outputfile
        	byte[] buffer = new byte[1024];
        	int length;
        	while ((length = myInput.read(buffer))>0){
        		myOutput.write(buffer, 0, length);
        		System.out.println("Read: " + buffer.toString());
        	}
     
        	//Close the streams
        	myOutput.flush();
        	myOutput.close();
        	myInput.close();
        	close();
        }

        public SQLiteDatabase openDataBase() throws SQLException{
        	 
        	//Open the database
            String myPath = DB_PATH + DB_NAME;
        	myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
        	return myDataBase;
     
        }

        @Override
    	public synchronized void close() {
     
        	    if(myDataBase != null)
        		    myDataBase.close();
     
        	    super.close();
     
    	}
     
    	@Override
    	public void onCreate(SQLiteDatabase db) {
     
    	}
     
    	@Override
    	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    		try {
				copyDataBase();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
    	}

       /* @Override
        public void onCreate(SQLiteDatabase db) 
        {
        	String dataContent = readContentDataBase();
        	
            db.execSQL(dataContent);
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, 
                              int newVersion) 
        {
            Log.w(TAG, "Upgrading database from version " + oldVersion 
                  + " to "
                  + newVersion + ", which will destroy all old data");
            db.execSQL("DROP TABLE IF EXISTS BusInfo");
            onCreate(db);
        }
        
        private String readContentDataBase(){

            InputStream inputStream = m_context.getResources().openRawResource(R.raw.businfo);
            
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            
            int i;
         try {
        	 i = inputStream.read();
          while (i != -1)
             {
	              byteArrayOutputStream.write(i);
	              i = inputStream.read();
             }
             inputStream.close();
         } catch (IOException e) {
	          // TODO Auto-generated catch block
	          e.printStackTrace();
         }
         
        return byteArrayOutputStream.toString();
       }*/
    } 
    
  //---opens the database---
    public AdapterBase open() throws SQLException 
    {
        db = DBHelper.openDataBase();
        	//DBHelper.getWritableDatabase();
        return this;
    }

    //---closes the database---    
    public void close() 
    {
        DBHelper.close();
    }
    
}
